llvm/test/CodeGen/AMDGPU/swdev282079.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -run-pass=si-fold-operands -o - %s | FileCheck %s

# This was attempting to look back through the REG_SEQUENCE source
# operands and trying to look for physreg defs.

---
name: fold_reg_sequence_of_copy_from_physreg_0
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
  scratchRSrcReg:  '$sgpr0_sgpr1_sgpr2_sgpr3'
  stackPtrOffsetReg: '$sgpr32'
  occupancy:       8
body:             |
  bb.0:
    ; CHECK-LABEL: name: fold_reg_sequence_of_copy_from_physreg_0
    ; CHECK: $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    ; CHECK: $vgpr1 = V_MOV_B32_e32 1, implicit $exec
    ; CHECK: S_NOP 0, implicit-def $vgpr0, implicit-def $vgpr1
    ; CHECK: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
    ; CHECK: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
    ; CHECK: [[REG_SEQUENCE:%[0-9]+]]:vreg_64_align2 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
    ; CHECK: [[DEF:%[0-9]+]]:vreg_64_align2 = IMPLICIT_DEF
    ; CHECK: FLAT_STORE_DWORDX2 killed [[DEF]], killed [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
    ; CHECK: S_ENDPGM 0
    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    $vgpr1 = V_MOV_B32_e32 1, implicit $exec
    S_NOP 0, implicit-def $vgpr0, implicit-def $vgpr1
    %0:vgpr_32 = COPY $vgpr0
    %1:vgpr_32 = COPY $vgpr1
    %2:vreg_64_align2 = REG_SEQUENCE %0, %subreg.sub0, %1, %subreg.sub1
    %3:vreg_64_align2 = IMPLICIT_DEF
    FLAT_STORE_DWORDX2 killed %3, killed %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
    S_ENDPGM 0

...

---
name: fold_reg_sequence_of_copy_from_physreg_1
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
  scratchRSrcReg:  '$sgpr0_sgpr1_sgpr2_sgpr3'
  stackPtrOffsetReg: '$sgpr32'
  occupancy:       8
body:             |
  bb.0:
    ; CHECK-LABEL: name: fold_reg_sequence_of_copy_from_physreg_1
    ; CHECK: $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    ; CHECK: $vgpr1 = V_MOV_B32_e32 1, implicit $exec
    ; CHECK: S_NOP 0, implicit-def $vgpr0, implicit-def $vgpr1
    ; CHECK: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
    ; CHECK: [[COPY1:%[0-9]+]]:vgpr_32 = COPY [[COPY]]
    ; CHECK: [[REG_SEQUENCE:%[0-9]+]]:vreg_64_align2 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
    ; CHECK: [[DEF:%[0-9]+]]:vreg_64_align2 = IMPLICIT_DEF
    ; CHECK: FLAT_STORE_DWORDX2 killed [[REG_SEQUENCE]], killed [[DEF]], 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
    ; CHECK: S_ENDPGM 0
    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    $vgpr1 = V_MOV_B32_e32 1, implicit $exec
    S_NOP 0, implicit-def $vgpr0, implicit-def $vgpr1
    %0:vgpr_32 = COPY $vgpr0
    %1:vgpr_32 = V_MOV_B32_e32 2, implicit $exec
    %2:vgpr_32 = COPY %0
    %3:vreg_64_align2 = REG_SEQUENCE %0, %subreg.sub0, %2, %subreg.sub1
    %4:vreg_64_align2 = IMPLICIT_DEF
    FLAT_STORE_DWORDX2 killed %3, killed %4, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
    S_ENDPGM 0

...

---
name: fold_reg_sequence_of_copy_from_physreg_2
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
  scratchRSrcReg:  '$sgpr0_sgpr1_sgpr2_sgpr3'
  stackPtrOffsetReg: '$sgpr32'
  occupancy:       8
body:             |
  bb.0:
    ; CHECK-LABEL: name: fold_reg_sequence_of_copy_from_physreg_2
    ; CHECK: $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    ; CHECK: $vgpr1 = V_MOV_B32_e32 1, implicit $exec
    ; CHECK: S_NOP 0, implicit-def $vgpr0, implicit-def $vgpr1
    ; CHECK: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 2, implicit $exec
    ; CHECK: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
    ; CHECK: [[REG_SEQUENCE:%[0-9]+]]:vreg_64_align2 = REG_SEQUENCE [[V_MOV_B32_e32_]], %subreg.sub0, [[COPY]], %subreg.sub1
    ; CHECK: [[DEF:%[0-9]+]]:vreg_64_align2 = IMPLICIT_DEF
    ; CHECK: FLAT_STORE_DWORDX2 killed [[DEF]], killed [[REG_SEQUENCE]], 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
    ; CHECK: S_ENDPGM 0
    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    $vgpr1 = V_MOV_B32_e32 1, implicit $exec
    S_NOP 0, implicit-def $vgpr0, implicit-def $vgpr1
    %0:vgpr_32 = V_MOV_B32_e32 2, implicit $exec
    %1:vgpr_32 = COPY $vgpr0
    %2:vreg_64_align2 = REG_SEQUENCE %0, %subreg.sub0, %1, %subreg.sub1
    %3:vreg_64_align2 = IMPLICIT_DEF
    FLAT_STORE_DWORDX2 killed %3, killed %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
    S_ENDPGM 0

...

# This would crash looking for a def in any mayLoad instruction
---
name: fold_inlineasm_def
tracksRegLiveness: true
body:             |
  bb.0:

    ; CHECK-LABEL: name: fold_inlineasm_def
    ; CHECK: INLINEASM &"s_waitcnt vmcnt($0)", 41 /* sideeffect mayload isconvergent attdialect */, 13 /* imm */, 0
    ; CHECK: S_ENDPGM 0
    INLINEASM &"s_waitcnt vmcnt($0)", 41 /* sideeffect mayload isconvergent attdialect */, 13 /* imm */, 0
    S_ENDPGM 0

...